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Manipal MET2018PhysicsMagnetic Effects of Current

Two long straight wires are set parallel to each other. Each carries a current in the same direction and the separation between them is 2 r . The intensity of the magnetic field mid-way between them is

Options

  1. A₀ i r
  2. B4 ₀ i r
  3. Czero
  4. D₀ i 4 r

Correct answer

A. ₀ i r

Step-by-step solution

At point P, aligned B_ net & =B_ A B +B_ C D & = ₀ i 2 r + ₀ i 2 r = ₀ i r aligned

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